Chair for mine-locomotives.



a. s. MUHGAN.

CHAIR FOB MINE LOCOMOTIVES. APPLICATION FILED IAN. 25,1918. Lh 1l @@0mmm N@v. 5, 1918.

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R. S. MORGAN..

CHAIR FOR MINE LOCOMOVTIVES. APPLICATION men 1m15.191s.

,284,139 i l Patented Nov. 5,1918.

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LMECHARD S. MURGA'N, 0F EIDWARDSVLLE, PENNSYLETANI..

CHAIR FOR MINE-LOGOMOTVIEE.

Specification of Letters Patent.

Patented hlov. 5, this..

Application filed January 25, 1918. Serial No. 213,781.

To all whom t may concern:

Be it known that ll, RICHARD S. MORGAN, a native-born citizen of theUnited States, re* siding at Edwardsville, in the county of Luzerne andState of Pennsylvania, have 1n vented certain new and usefulImprovements in Chairs for Mine-Locomotives; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomalte and use the same.

This invention relates to chairs, and more particularly to a chairadapted especially for combination with a mine locomotive.

, It has been found that satisfactory service by operators of minelocomotives has been difficult to obtain and difficulty is found inholding this class of operators for any length of time to this type ofservice, for the reason, that these locomotives are operated throughtunnels and over very circuitous roadways, in which there are manyswitch overs and crossings and in which frequently the curves are verysharp, with `the result that the operators are violently jolted whenoccupying their station at the controller of the-motor..

Because of the roughness of this class of service, the operators aresubjected to spinal strains as well also to be thrown out of theirseats.

lt hasbeen proposed to provide various types of movable and yielding`seats for mine motor car operators, but difficulty has been encounteredin the principal solution of this problem because some of the seats arenot sufliciently steady, and "owing to the sharp curves will rock andthrow the open ators. j. j

Again the structure of same is such that they elevate the operators too`high with respect to the motor and thuslendanger his .striking overheador projecting obstacles during the operation of the motor. i.

Agaimchairs that have been proposed for attachment to the motorsrequireconsiderable `alteration of the structure and moreover arenotcapable of the widerange of adjustment desirablefor the service.

lt is one of the objects of this invention to provide the combination ofa mine motor car and Aseat or chair which will provide for the desiredrange of adjustment.`

lit is another object of the invention to provide a seat or chair havingthe desired resilient capacity to absorb shocks and which at the sametime may be readily connected to the vehicle structure with the minimumrequirement of machine work or alteration ofthe vehicle and which chair1s of such construction that it will not materially ele-` vate theoperator at his station and thus minimize the danger of his encounteringoverhead or adjacent structures along the traclrway.

llt is another and important object of the present'invention to providefor the desired degree of resiliency to taire up shocks with outunduerebounding and preventing swaying motionsidewise. .j l

With these and other objects in view as will be readily manifest tothose skilled in the art, the presentiinvention consists of theconstruction, the combination, and in jdetail. arrangement of parts asset forth in the following specification which is descriptive of oneform of my invention as illustrated in the accompanying drawing, whereinj Figure 1 is a perspective viewof the deu vice as applied. ,i

lFig. 2 is a front perspective view of the detached chair.

\ Figa@ is a perspective view looking' toward one side of the chair.

Figli is a perspective view of the baclr of the chair.

Fig. 5 is a perspective viewof the bottom usually of low overheadstructures or forma j tions and the operators must o ccupy a lowposition as possible at his station to avoid .the overhead obstacles. i

Sometimes the operator simply places or uses a cushion or seat directlyon any conw j `verneint shelf or bench portion` at the controllerstation but this is objectionable for the reason that he is subjected toserious vibrations.. llkely to cause physical injury because of thejolting of the motor.

Therefore, l have provided a simple, sub stantial, practical andinexpensive chair construction and provided for the eiicient attachmentthereof, tothe motor, the attach ing means providing a large capacity ofadj p justment of the chair with respect to the motor structure.

As shown, a plate 5, hereinafter referred to as the perch plate isadapted to be connected to any convenient bench or shelf portion as thebumper 4 by means of bolts or screws 6 which may be passed throughapertures 7 which are arranged in a radial line from ythe circular head8 at one end of the plate and which is provided with an upstandingtrunnion or pin 9 which may be threaded at itsupper end to receive a nut10.

The bolt or bolts 6 are adapted to be inserted in respective holes madetherefor or provided in the bench portion 4 of the motor.

When the bench plate 5 has been attached as desired there is thenmounted on the pin 9 a chair structure shown comprising a frame 11having a transverse member 12 perforated at its center to receive thepin 9 the frame also including a pair of parallel side armsor members 13forwardly extending portions of which are pivotally connected as at 14to the front'portion or edge of a seat structure 15 to the side edges ofwhich may be attached parallel bars or renforcing `members 16 which inthey present instance a're hinged at 14 to the front ends of the arms13.

These arms are shown as substantially straight and slightly up turned atthe front endsv to form the hinge 14 while at their rear ends they areprovided with upturned elbows 17 having' downturned or hook ends 18perforated t0 receive the adjacent ends of springs.; 19 whose lower endsare hooked at 20 to the rear perforated ends of the side rods 16 whichare normally held upwardly inclined as shown in Fig. 3 so that when theseat 15 vis occupied ample downward swing of the seat is provided whenthe springs 19l are elongated by the weight of the operator on theysuspended seat.

The chair may or may not be provided with a back though one is indicatedat 22 in the present embodiment.

Asclearly shown in Fig. 5 the back is upheld byr` a pair of L-shapedbraces 21 fastened to the bottom of the seat 15 and eX- tend'ing up therear ofthe back which latter is clearly shown in Fig. 4 as beingrecessed as atv 22 vbelow its top portion so yas, to provide within` thelines of the back for movement toward and from the elbows 1 7 extendingalong the sides ofthe back and which are formedA as parts of the bottomarms 13, which pass beneath the sides ofthe bottom of the chair.

From the above it will be seen that the chair construction is of mostcompact arrangement so that none of the parts project materially beyondthe area occupied by the seat andthe back, again it will be seen thatthe chair can be supported in close relation to thebench or shelf andthus minimize in head room and avoid elevating the operator when heoccupies the seat'to any appreciable degree.

The chair seat is pivoted on an axial line which is parallel and closeto its front edge and is yieldingly suspended at its back to swing upand down and absorb shocks.

The chair seat is prevented from having 'lateral swaying motion andbeing rotative in a horizontal plane about its pivot pin 9, enables theoperator to easily climb into the seat and swing it into convenientrelation tothe controlling mechanism of the motor and also enables himto rapidly swing the seat to clear himself from the motor in case ofrunaway or other events.

An important feature of the invention resides in the capacity foradjustment of the chair through a large range of positions by virtue ofthe perch plate 5 which may be connected to the supporting bench orshelf, so as to extend with its bearing portion 8 set as shown in Fig.2, to project the chair rearwardly from the portion to which theAopposite end of the plate 5 may be connected: or as shown in Fig. 4 thebearing portion 8 of the perch plate may be set so as to project thechair in advance of the attaching portion: or again the attachingportion may be set to extend laterally of the chair as is shown in Fig.3.

These various positions of the perch plate with respect to the chairobviously will be readily determined by the construction of the motor orlocomotive at the operators station.

Preferably the chair is provided with a back as shown against which theoperator may lean so as to throw more of his weight on the springs andlessen the danger of being thrown offwhen rounding curves.

The chair frame may be supported if desired on the support or bracemember 5 on ball or other anti-friction bearings to provide for greaterease of its revolution about its pivot pin, this being accomplished bywell known devices which it is thought need not be shown in the presentinstance.

What I claim is:

1. The combination, with a chair of a perch-plate having a perpendicularbearing for rotative connection at one end with the chair, and' providedwith a series of apertures to receive means for connection to a suitablesupport, whereby the chair may be variously angularly disposed as tosaid support and is freely rotative on said plate.

2. A chair comprising a seat, and a frame disposed below and hinged tothe front edge of the seat, and suspension means connected to the rearof the seat and said frame for yieldingly suspending the seat, saidframe having elbows turned upwardly at the rear of the seat and withinthe side lines of the seat to which said means are attached.

Laet-reo 3. A chair comprising a seat, and a frame disposed below andhinged to the front edge of the seat, and suspension means connected tothe rear of the seat and said frame for yieldingly suspending the seat,said frame having elbows turned upwardly at the rear and within the sidelines of the seat to which said means are attached, the chair having aback which is recessed at its lower side portions to clear said means.

et. A chair comprising a seat, a Substair tially Irl-shaped frame to thefront end of which the Seat is `pvoted at its edge, and a bearing onwhich 'the transverse component of the frame is rotative on an axiscentrally of and perpendicizlar to the frame.

5. A chair comprising a seat, a substantially lul-shaped frame t0 thefront end of which the seat is pivoted at its edge, and a bearing onWhieh the transverse component of the frame is rotative on anaxiscentrally of and perpendicular to the frame, tuhe frame having nptnrnedelbows, and Suspension means connecting' said elbows and the seat.

ln testimony whereof l affix my signature.

RICHARD S. MORGAN.

Copies of this patent may be obtained for ve cents each, by addressingthe Gommissioner of :Pate-nte. Washington, 3D.

